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(No Model.)

C. S. BOOTH. PRBEZING PLATE FOR IGE MAUHINES.

ww n. .MINWKN whine Patented Sept. 11,1894.

OOOOOOOOOCDO UNITED STATES PATENT OFFICE.

CHARLES S. BOOTH, OF OAKLAND, CALIFORNIA, ASSIGNOR OF TWO'IHIRDS TO THOMAS L. ARMSTRONG AND EDWARD B. NORTON, OF SAME PLACE.

FREEZING-PLATE FOR ICE-MACHINES.

SPECIFICATION forming part of Letters Patent No. 525,733, dated September 11, 1894.

Application filed March 23, 1894. SerialNo. 504,857. (No model.)

To all whom it may concern.:

Be it known that I, CHARLES S. BOOTH, a resident of Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Freezing- Plates for Ice-Machines; and I do hereby declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it ap pertains to make and use the same.

My invention relates to an improvement in freezing plates for ice machines,the object of the invention` being to so construct a freezing plate that brine or other uid can be made to circulate through it evenly and at a uniform velocity throughout the entire extent of the plate.

A further object is to construct a freezing plate for an ice machine in such manner'that it can be readily cleaned should it become clogged.

A further object is to produce a freezing plate for anice machine which shall be simple in construction and effectual, in every respect, in the performance of its functions.

With these objects in View the invention consists in certain novel features of construction and combinations and arrangements of parts as hereinafter set forth and pointed out inthe claims.

In the accompanying drawingsz' Figure 1 is a face view of my improved freezing plate partly in section. Fig. 2 is a vertical cross section. Fig. 3 is a horizontal cross section.

A, A', represent two pipes, each having interior screw threads a, at each end, and each having an elongated slot A2, which slots extend to within about two inches of the ends of said pipes. The pipes A, A are placed a proper distance apart and are inclos'ed by the sides of the freezing plate, said sides being composed of two plates of galvanized iron B, B, the upper and lower edges of which are made to embrace the respective pipesA, A', as shown in Fig. 2, and are soldered to said pipe. Thus it will be seen that the pipe A is located at the top of the freezing plate and the pipe A at the bottom thereof. The plates B, B, are connected at their ends by means of narrow plates C, C, bolted or riveted thereto. At intermediate points the plates B, B,

are connected by rivets b and encircling these rivets sleeves b are located between the plates B, B,-the purpose of these rivets and sleeves being to assist the plates B in withstanding the pressure brought to bear against them when the device is in operation. One end of each pipe A, is provided with a closed plug D having screwthreads to mesh with the internal screwthreads ct at that end of the pipe, each of said plugs being made with a chamber c, and the inner end of each plug is beveled as at d, whereby to properly direct the end of a pipe E thereinto, there being one of these pipes E within each pipe A, A', and the pipes E are retained properly in the center of the pipes A, by the chambered plug D at one end, and by means of a sleeve or collar D at the other end. One endof each pipe E is internally screwthreaded for the reception of a screwthreaded plug e which closes said end of the pipe, and the other end ofeach pipe E is screwA threaded exteriorly as at f, for the reception of the sleeve or collar D. The sleeve or collar D is placed on the end of pipe E and screwed to the end of the'screw threads on said pipe and then soldered. rlhe exterior of the sleeve or collar D being screw threaded, it is then screwed into the end of the pipe A, this connection between the pipes A A and E being the same both at the top and the bottom of the freezing plate. The pipe E is made with a number of perforations g which should exactly align with the elongated slots in the pipes A,A,` and the perforations in said pipes E at the inlet end of the freezingplate are made smaller than those at the opposite end, for a reason which will presently be made apparent.' i f In the construction of freezing plates for ice machines it has heretofore been proposed to provide single pipes at the top and bottom thereof and to perforate these single pipes. The perforations are liable to become clogged after the plate has been in use for a time and .with single pipes secured within the top and ICO pipe E again inserted within the pipe A and secured as before.

The freezing plate, when in use, operates as follows: I submerge the plate (or a series of such plates) in clean water in a suitable tank, the plates being arranged vertically in said tank. A suitable pipe is connected with the lower inlet G and another pipe with the outlet G. Brine is made to flow into the plate at inlet G, and from the lower pipe E the brine will flow through the perforations therein and lill the plate, and then passing through the perforations in the upper pipe E and escaping through the latter. The reason that the perforations at the inner ends of the pipes E are smaller than those at the other end, is so that the brine running into the llower pipe will distribute itself evenly the enwill be made to circulate through the plate evenly and at the same velocity throughout the entire surface of the plate.

My improvements are Very simple in construction, comparatively cheap to manufacture, can be easily kept in good working order'and are eectual, in every respect in the performance of their functions.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination with the walls of a freezing plate, of removable perforated pipes located between said walls at diametrically opposite edges of the plate, substantially as set forth.

2. The combination with the walls of a freezingplate, of a perforated pipe located besaid walls and having slots therein, and a perforated pipe within each of said first-mentionedpipes, ksubstantially as set forth.

4. In afreezing plate, the combination with the walls thereof, of pipes located between said walls,.each of said pipes having an elongated slot therein, and vperforated pipes r0- movably secured within said first-mentioned 6o pipes and having therein perforations in alignment with said elongated slots, Substantially as set forth.

5. In a freezing plate, the combination with the Walls thereof, of pipes located between Y said walls, a plug closing one end of each of said pipes, a perforated pipe located within each of said first mentioned pipes and having a bearing at one end in said plugs, the pere. forations of said pipes being adapted to align 1n with slots in the first-mentioned pipes, and collars adapted to vclose the opposite ends 0l said first-mentioned pipes and encircling the perforated pipes, vsubstantially asset forth.

6. In a freezing plate, the combination with. 15 the walls thereof, of slotted pipes securedbltween said walls, a hollow plug havinga baleled inner end, closing one end of each if said pipes, a collar adapted to enter the eth0!" end of each pipe, and aperforated pipe within each first-mentioned pipe, one end of cash perforated pipe being closed and having `its bearing in `said hollow plug and the other mi passing through said collar, the perforation! of said pipes being adapted toalign with tlm ,85 slots of the first-mentioned pipes, substnlltially as set forth.

7. In a freezing plate, the combination with the walls thereof, of pipes having slotsrl cured between said walls, a plug closing 0M 9e end of each pipe, a perforated pipe -wi each slotted pipe and having its perforation in alignment with said slots, and aremovahk.. plug at one end of each perforated pipe, lubstantially as set forth.

8. In a freezing plate, the combinationwitll the Walls thereof, of pipes having slots,ln cured between said walls, both ends of eelm pipe being internally screwthreaded, a hole low plug adapted to screw into one end of ma each pipe, a screwthreaded collar adapted screw into the other end of each pipe, amLa` perforated pipe within each slotted pipealpd. having their bearings at one end within said hollow plugs and adapted at the other end. la, mesh with screwthreads in said collars, substantially as set forth.

In testimony whereof I havesigned this specification in the presence of two subscrib-V ing witnesses.

C. S. BOOTH. Witnesses:

E. B. NORTON, J. C. BAKER. 

